干旱区生态环境知识资源中心(Arid): The Impact of Extreme Rainstorms on Escarpment Morphology in Arid Areas: Insights From the Central Negev Desert

Arid

DOI	10.1029/2023JF007093
	The Impact of Extreme Rainstorms on Escarpment Morphology in Arid Areas: Insights From the Central Negev Desert
	Shmilovitz, Yuval; Marra, Francesco; Enzel, Yehouda; Morin, Efrat; Armon, Moshe; Matmon, Ari; Mushkin, Amit; Levi, Yoav; Khain, Pavel; Rossi, Matthew W.; Tucker, Greg; Pederson, Joel; Haviv, Itai
通讯作者	Shmilovitz, Y
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
ISSN	2169-9003
EISSN	2169-9011
出版年	2023
卷号	128 期号:10
英文摘要	The impact of climate on topography, which is a theme in landscape evolution studies, has been demonstrated, mostly, at mountain range scales and across climate zones. However, in drylands, spatiotemporal discontinuities of rainfall and the crucial role of extreme rainstorms raise questions and challenges in identifying climate properties that govern surface processes. Here, we combine methods to examine hyperarid escarpment sensitivity to storm-scale forcing. Using a high-resolution DEM and field measurements, we analyzed the topography of a 40-km-long escarpment in the Negev desert (Israel). We also used rainfall intensity data from a convection-permitting numerical weather model for storm-scale statistical analysis. We conducted hydrological simulations of synthetic rainstorms, revealing the frequency of sediment mobilization along the sub-cliff slopes. Results show that cliff gradients along the hyperarid escarpment increase systematically from the wetter (90 mm yr(-1)) southwestern to the drier (45 mm yr(-1)) northeastern sides. Also, sub-cliff slopes at the southwestern study site are longer and associated with milder gradients and coarser sediments. Storm-scale statistical analysis reveals a trend of increasing extreme (>10 years return-period) intensities toward the northeast site, opposite to the trend in mean annual rainfall. Hydrological simulations based on these statistics indicate a higher frequency of sediment mobilization in the northeast, which can explain the pronounced topographic differences between the sites. The variations in landscape and rainstorm properties across a relatively short distance highlight the sensitivity of arid landforms to extreme events.
英文关键词	rainstorms escarpment cliff topographic analysis sheetwash runoff
类型	Article
语种	英语
开放获取类型	Green Published, hybrid
收录类别	SCI-E
WOS记录号	WOS:001081529900001
WOS关键词	DURATION-FREQUENCY CURVES ; SCARP RETREAT RATES ; FLASH-FLOOD ; RAINFALL INTENSITY ; TALUS FLATIRONS ; CLIMATE-CHANGE ; HYDRAULIC CONDUCTIVITY ; SPATIAL-DISTRIBUTION ; CONVECTIVE RAINFALL ; HEAVY PRECIPITATION
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397361
推荐引用方式 GB/T 7714	Shmilovitz, Yuval,Marra, Francesco,Enzel, Yehouda,et al. The Impact of Extreme Rainstorms on Escarpment Morphology in Arid Areas: Insights From the Central Negev Desert[J],2023,128(10).
APA	Shmilovitz, Yuval.,Marra, Francesco.,Enzel, Yehouda.,Morin, Efrat.,Armon, Moshe.,...&Haviv, Itai.(2023).The Impact of Extreme Rainstorms on Escarpment Morphology in Arid Areas: Insights From the Central Negev Desert.JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE,128(10).
MLA	Shmilovitz, Yuval,et al."The Impact of Extreme Rainstorms on Escarpment Morphology in Arid Areas: Insights From the Central Negev Desert".JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE 128.10(2023).